From: Alex Williamson <alex.williamson@redhat.com>
To: Tina Zhang <tina.zhang@intel.com>
Cc: intel-gvt-dev@lists.freedesktop.org, kvm@vger.kernel.org,
linux-kernel@vger.kernel.org, kraxel@redhat.com,
zhenyuw@linux.intel.com, hang.yuan@intel.com,
zhiyuan.lv@intel.com
Subject: Re: [PATCH 1/2] vfio: ABI for setting mdev display flip eventfd
Date: Mon, 27 May 2019 08:04:30 -0600 [thread overview]
Message-ID: <20190527080430.28f40888@x1.home> (raw)
In-Reply-To: <20190527084312.8872-2-tina.zhang@intel.com>
On Mon, 27 May 2019 16:43:11 +0800
Tina Zhang <tina.zhang@intel.com> wrote:
> Add VFIO_DEVICE_SET_GFX_FLIP_EVENTFD ioctl command to set eventfd
> based signaling mechanism to deliver vGPU framebuffer page flip
> event to userspace.
>
> Signed-off-by: Tina Zhang <tina.zhang@intel.com>
> ---
> include/uapi/linux/vfio.h | 12 ++++++++++++
> 1 file changed, 12 insertions(+)
>
> diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h
> index 02bb7ad6e986..27300597717f 100644
> --- a/include/uapi/linux/vfio.h
> +++ b/include/uapi/linux/vfio.h
> @@ -696,6 +696,18 @@ struct vfio_device_ioeventfd {
>
> #define VFIO_DEVICE_IOEVENTFD _IO(VFIO_TYPE, VFIO_BASE + 16)
>
> +/**
> + * VFIO_DEVICE_SET_GFX_FLIP_EVENTFD - _IOW(VFIO_TYPE, VFIO_BASE + 17, __s32)
> + *
> + * Set eventfd based signaling mechanism to deliver vGPU framebuffer page
> + * flip event to userspace. A value of -1 is used to stop the page flip
> + * delivering.
> + *
> + * Return: 0 on success, -errno on failure.
> + */
> +
> +#define VFIO_DEVICE_SET_GFX_FLIP_EVENTFD _IO(VFIO_TYPE, VFIO_BASE + 17)
> +
> /* -------- API for Type1 VFIO IOMMU -------- */
>
> /**
Why can't we use VFIO_DEVICE_SET_IRQS for this? We can add a
capability to vfio_irq_info in the same way that we did for regions to
describe device specific IRQ support. Thanks,
Alex
next prev parent reply other threads:[~2019-05-27 14:04 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-27 8:43 [PATCH 0/2] Deliver vGPU page flip event to userspace Tina Zhang
2019-05-27 8:43 ` [PATCH 1/2] vfio: ABI for setting mdev display flip eventfd Tina Zhang
2019-05-27 9:07 ` Zhenyu Wang
2019-05-27 12:22 ` Gerd Hoffmann
2019-05-28 2:51 ` Zhenyu Wang
2019-05-27 14:04 ` Alex Williamson [this message]
2019-05-28 1:42 ` Zhang, Tina
2019-05-28 4:18 ` Alex Williamson
2019-05-27 8:43 ` [PATCH 2/2] drm/i915/gvt: Support delivering page flip event to userspace Tina Zhang
2019-05-27 9:11 ` Zhenyu Wang
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